US3670976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delivery device for threads on weaving machines, knitting machines, or the like
Assignee: Sobrevin Societe de Brevets Industriels
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Filing: 1970-04-16
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Granted: 1972-06-20
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Expires: 1990-04-16
Abstract
Abstract A delivering device for threads on weaving machines, knitting machines, or the like, which comprises a motor and a drum which is rotated by the motor and adapted to store intermediately a predetermined thread supply prior to each thread removal. A thread supply surveillance device is arranged for stopping the motor upon reaching a nominal-thread supply. The motor comprises an asynchronous two-phase motor. A current valve circuit is provided for feeding current to the motor. The surveillance device emits a motor stopping-command signal in both phases in the stopping position, and the current valve circuit is transferred by the command signal for either positive or negative half-waves.
Inventors
- 👤 Giuseppe Vischiani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:00
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/38; D04B15/48; D04B15/482; D03; D03D; D03D47/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A delivering device for threads on weaving machines, knitting machines, or the like, comprising a motor, a drum rotated by said motor and adapted to store intermediately a predetermined thread supply prior to each thread removal, a thread supply surveillance device for stopping said motor upon reaching a nominal-thread supply, said motor comprising an asynchronous two-phase motor, a current valve circuit for feeding current to said motor, said surveillance device emitting a motor stopping-command signal in both phases in the stopping position, and means for transforming said current by said command signal for one of positive and negative half-waves.
Claim 2
Dependent Claim
99 words
A delivering device for threads on weaving machines, knitting machines, or the like, comprising a motor, a drum rotated by said motor and adapted to store intermediately a predetermined thread supply prior to each thread removal, a thread supply surveillance device for stopping said motor upon reaching a nominal-thread supply, said motor comprising an asynchronous two-phase motor, a current valve circuit for feeding current to said motor, said surveillance device emitting a motor stopping-command signal in both phases in the stopping position, and means for transforming said current by said command signal for one of positive and negative half-waves.
Claim 3
Dependent Claim
37 words
The delivering device, as set forth in claim 1, wherein said current valve circuit is locked in both phases for said half-waves of one sign and also in a phase for said half-waves of the other sign.
Claim 4
Dependent Claim
49 words
The delivering device, as set forth in claim 1, wherein said current valve circuit comprises for each phase two-diodes disposed anti-parallel in an exciter current circuit, and said diodes determined for the conduit of the positive half-waves are controllable in dependency upon said command signal of said surveillance device.
Claim 5
Dependent Claim
46 words
The delivering device, as set forth in claim 3, further comprising means for moving said negative half-waves of the phase with a time-lag over said controllable diode in said exciter current circuit of the phase moving ahead in phase, and for locking by said command signal.
Claim 6
Dependent Claim
38 words
The delivering device, as set forth in claim 4, wherein said surveillance device comprises a photoelectric device, and the signal voltage of the latter releases an occurrence of a locking voltage at the grids of said controlled diodes.
Claim 7
Dependent Claim
51 words
The delivering device, as set forth in claim 5, which includes a transistorized time switching circuit with a resistance operatively connected to said current valve circuit such that the length of the opening times of said controllable diodes falling into the positive half-waves is adjustable by said transistorized time switching circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |